PYLUM:Chordata

• What is the phylum that includes chordates?

  Chordata
• Why are chordates considered the most advanced phylum in the animal kingdom?

  They possess complex structures and systems that support advanced functions.
• In what types of habitats do chordates live?

  They live in the sea, fresh water, and terrestrial habitats.
• What is the notochord and its role in chordates?

  The notochord is a dorsal, rod-like structure that supports the body during the embryonic stage.
• What happens to the notochord in adult chordates?

  It may remain or be replaced by a vertebral column.
• What are animals that develop a vertebral column classified as?

  Vertebrates
• How many subphyla are there in the phylum Chordata?

  Three
• Which subphylum of Chordata is the best known?

  Vertebrata
• How many classes are there in the subphylum Vertebrata?

  Five
• What are the five classes of Vertebrata?

  • Fish
  • Amphibians
  • Reptiles
  • Birds
  • Mammals
• What type of symmetry do all members of Chordata exhibit?

  Bilateral symmetry
• Where is the brain located in chordates?

  At the anterior end of the body.
• What is the structure of the nervous system in chordates?

  It is advanced with receptor organs for sight, hearing, smell, and touch at the anterior end.
• How many germ layers do chordates have during embryonic development?

  Three germ layers
• What are the three germ layers in chordates?

  Ectoderm, mesoderm, and endoderm.
• What type of body cavity do all chordates possess?

  A true coelom.
• What type of digestive tract do chordates have?

  A complete/through gut with two openings.
• What is the function of the specialized regions in the digestive tract of chordates?

  They have specific functions throughout the length of the digestive tract.
• What type of skeleton do chordates have?

  An endoskeleton of bone and/or cartilage.
• What systems are responsible for movement and locomotion in chordates?

  The endoskeleton and muscular system.
• How is blood circulated in chordates?

  Blood is restricted to blood vessels, indicating a closed blood system.
• What are the specialized gaseous exchange organs in chordates?

  Glands in fish and lungs in amphibians, reptiles, birds, and mammals.